Update Vite (#7078)

* Bump vite from 5.4.21 to 6.4.2 in /packages/template-react-router

Bumps [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite) from 5.4.21 to 6.4.2.
- [Release notes](https://github.com/vitejs/vite/releases)
- [Changelog](https://github.com/vitejs/vite/blob/v6.4.2/packages/vite/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite/commits/v6.4.2/packages/vite)

---
updated-dependencies:
- dependency-name: vite
  dependency-version: 6.4.2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update bun.lock after dependency bump

Made-with: Cursor

* Update vite to 6.4.2 across all monorepo packages

Made-with: Cursor

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jonny Burger <jonathanburger11@gmail.com>